请根据句意、中文提示或英语释义写单词。
Musical training can make you smarter,         (尤其) when you start at a young age.
Li Minhao’s ________(到达) made the fans scream excitedly.
The real purpose of study is to ____________(make better) your abilities.
The CD-ROM helps you learn English by testing your _____(information and understanding in the mind) of English grammar.
As we know,        is the second month of a year.